Marc Thach Xuan Ky wrote: > > Scott, > A clue from this webpage: > http://www.psc.edu/networking/perf_tune.html > Describing Win98 it says "DefaultRcvWindow is a string type and > the > value describes the default receive windowsize for the TCP > stack. > Otherwise the windowsize has to be programmed in apps with > setsockopt." > Perhaps the app is setting it differently. It also seems to > imply that > GlobalMaxTcpWindowSize should do it since the OS should enforce > this on > the app. Do you know what units the variable uses? that website > indicates that the default is a gig, so it may be measured in K > or M, > just a thought.
Hey...I hadn't thought of that. None of these keys even existed in my registry when I started out, so it's impossible to know what the default was. I just assumed it was octet-based. Let me try some new numbers assuming K or M. Thanks! > rgds > Marc > > > s vermill wrote: > > > > Marc Thach Xuan Ky wrote: > > > > > > Are you trying to make the window smaller? > > > rgds > > > Marc > > > > Yes. I was hoping to set up a demonstration on the impact of > high > > bandwidth*delay product networks without actually having a > high > > bandwidth*delay product network. By artifically enforcing a > small rcv > > window, I should get about the same result. > > > > Thanks Marc, > > > > Scott > > > > > > > > s vermill wrote: > > > > > > > > On a W2k machine, I've tried several different > > > recommendations for adjusting > > > > the TCP receive window size. None of them, including > those > > > directly from > > > > Microsoft, seem to have any impact. I'm capturing my own > > > traffic and my > > > > advertised window is always in the 64k range. > > > > > > > > I've tried editing the \tcpip\parameters to include > > > 'TcpWindowSize' and > > > > 'GlobalMaxTcpWindowSize' - neither of which had any > effect. > > > I've tried > > > > editing \VxD\MSTCP to include 'DefaultRcvWindow' - also no > > > effect. > > > > > > > > Anyone know how to manipulate the rcv window that my > machine > > > will > > > > advertise. For that matter, what about the other MS OSes? > > > XP? Win98? > > > > > > > > Thanks all, > > > > > > > > Scott > > Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=59418&t=59400 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
